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java.lang.ArrayIndexOutOfBoundsException: 2	at java.util.Arrays$ArrayList.get(	at$null$4(	at$toMap$58(	at$3ReducingSink.accept(	at java.util.Spliterators$ArraySpliterator.forEachRemaining(	at	at	at$ReduceOp.evaluateSequential(	at	at	at$getRowsMappedToHeadings$5(	at$3$1.accept(